Finding the Fourth Proportional to 12,724.30, 17,559.64 and 7,059.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,724.30 : 17,559.64 = 7,059.42 : x
2. Step 2: Convert to fraction form
   12,724.30/17,559.64 = 7,059.42/x
3. Step 3: Cross multiply
   12,724.30x = 17,559.64 × 7,059.42
4. Step 4: Simplify right side
   12,724.30x = 123,960,873.81
5. Step 5: Solve for x
   x = 123,960,873.81/12,724.30
6. Step 6: Final answer
   x = 9,742.06